Did I Get Food Poisoning?

Okay, on Sunday Feb 6 I was invited to go out cruising with friends and we all stopped by "Mi Pueblo" Market. And we decided to eat some oysters what they were serving and ate 5 of them with lime juice, onions and tomatoes. On Monday, I started to feel sick while working had small pain in stomach and gas. Then feeling weak.... When I got home, I went to bed figures that I was tired and then around midnight had feeling that I was gonna throw up and I did 3 times and went back to bed. Next day woke up i was so weak with pains from all over, hands, arms, chest, and legs. Told my pop to go to store and buy me crackers that have salts in it and water bottles. Ate and drank them slowly. Then I rest for a whole day, when i woke up feeling lot better and went to work. Then next week it happened again but it was different. I vomited just once and after that had a very sharp stabbing pain in my stomach. Tried lying down but wouldn't work it gets worse and the pain grow bigger felt like if gonna explode. And then I tried walking around and it kinda works when the pain fades away and all sudden burning up so bad like if I'm go in flames and sweats lot too. Good thing I went outside to cool off because it is very cold.... And then when it pes I tried to lie down and the stabbing pain in my stomach comes back again but this time i didn't burn up drank some milk it helps to get rid of pain in stomach. any ideas what going on with me?